转自: http://blog.csdn.net/lihonggen0/archive/2004/09/14/103511.aspx
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SQL Server 存储过程的分页,这个问题已经讨论过几年了,很多朋友在问我,所以在此发表一下我的观点2
建立表:3
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CREATE TABLE [TestTable] (5
[ID] [int] IDENTITY (1, 1) NOT NULL ,6
[FirstName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL ,7
[LastName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL ,8
[Country] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,9
[Note] [nvarchar] (2000) COLLATE Chinese_PRC_CI_AS NULL10
) ON [PRIMARY]11
GO12
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插入数据:(2万条,用更多的数据测试会明显一些)16
SET IDENTITY_INSERT TestTable ON17
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declare @i int19
set @i=120
while @i<=2000021
begin22
insert into TestTable([id], FirstName, LastName, Country,Note) values(@i, 'FirstName_XXX','LastName_XXX','Country_XXX','Note_XXX')23
set @i=@i+124
end25
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SET IDENTITY_INSERT TestTable OFF27
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-------------------------------------31
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分页方案一:(利用Not In和SELECT TOP分页)33
语句形式:34
SELECT TOP 10 *35
FROM TestTable36
WHERE (ID NOT IN37
(SELECT TOP 20 id38
FROM TestTable39
ORDER BY id))40
ORDER BY ID41
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SELECT TOP 页大小 *44
FROM TestTable45
WHERE (ID NOT IN46
(SELECT TOP 页大小*页数 id47
FROM 表48
ORDER BY id))49
ORDER BY ID50
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-------------------------------------52
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分页方案二:(利用ID大于多少和SELECT TOP分页)54
语句形式:55
SELECT TOP 10 *56
FROM TestTable57
WHERE (ID >58
(SELECT MAX(id)59
FROM (SELECT TOP 20 id60
FROM TestTable61
ORDER BY id) AS T))62
ORDER BY ID63
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SELECT TOP 页大小 *66
FROM TestTable67
WHERE (ID >68
(SELECT MAX(id)69
FROM (SELECT TOP 页大小*页数 id70
FROM 表71
ORDER BY id) AS T))72
ORDER BY ID73
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-------------------------------------76
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分页方案三:(利用SQL的游标存储过程分页)78
create procedure XiaoZhengGe79
@sqlstr nvarchar(4000), --查询字符串80
@currentpage int, --第N页81
@pagesize int --每页行数82
as83
set nocount on84
declare @P1 int, --P1是游标的id85
@rowcount int86
exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@rowcount=@rowcount output87
select ceiling(1.0*@rowcount/@pagesize) as 总页数--,@rowcount as 总行数,@currentpage as 当前页88
set @currentpage=(@currentpage-1)*@pagesize+189
exec sp_cursorfetch @P1,16,@currentpage,@pagesize90
exec sp_cursorclose @P191
set nocount off92
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其它的方案:如果没有主键,可以用临时表,也可以用方案三做,但是效率会低。94
建议优化的时候,加上主键和索引,查询效率会提高。95
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通过SQL 查询分析器,显示比较:我的结论是:97
分页方案二:(利用ID大于多少和SELECT TOP分页)效率最高,需要拼接SQL语句98
分页方案一:(利用Not In和SELECT TOP分页) 效率次之,需要拼接SQL语句99
分页方案三:(利用SQL的游标存储过程分页) 效率最差,但是最为通用100
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在实际情况中,要具体分析。更多的讨论见:
http://community.csdn.net/Expert/topic/3292/3292678.xml?temp=.1621515
转自: http://blog.csdn.net/lihonggen0/archive/2004/09/14/103511.aspx